FIT screening

Dikkedarmkanker, ook wel colorectaal carcinoom, is een veelvoorkomende ziekte onder voornamelijk ouderen. Het detecteren van dikke darmkanker in een vroeg stadium kan de overlevingskans van een patiënt aanzienlijk vergroten. Door gebruik te maken van een fecale immunochemische test (FIT) worden kleine hoeveelheden bloed (met behulp van antilichamen voor humaan hemoglobine) opgespoord in ontlastingsmonsters.


Sysmex biedt FIT-tests aan voor twee hoofdgroepen: grootschalig tests voor nationale of regionale bevolkingsonderzoeken, en symptomatische tests die hoofdzakelijk plaatsvinden in ziekenhuizen of klinische omgevingen. Lees hier meer over op onze FIT screening microsite www.fitscreening.eu/

Molecular Size

The size or hydrodynamic radius RH can be determined in two ways. The first method is by Dynamic Light Scattering (DLS), which is generally used as a batch technique to measure the average size in the whole sample, but can be used as a detector for Size Exclusion Chromatography (GPC/SEC).

A very accurate and precise method of obtaining RH of all components in a sample is by triple detection after separation by SEC.

By the use of online light scattering and viscometer detectors, the MW and intrinsic viscosity of the polymer or protein can be determined and hence the RH calculated at any point on the chromatogram.

The benefit of both these techniques is that there is no practical upper or lower size limit for the materials being investigated.

The measurement of molecular size is a useful parameter for a number of applications:

  • Comparison with molecular weight gives information about structure
  • DLS can use molecular size to give a quick estimate of molecular weight
  • DLS can give a fast screen of protein purity
  • Determination of protein melting point.
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